### The Physics Philes, lesson 50: Torque It

Holy cow. We’re on lesson 50 of the Physics Philes. I’ve learned so much on this endeavor, and yet, there is so much to go. So onward! This week we will start a discussion of torque. We know from previous installments that the net force applied to a body gives …

### The Physics Philes, lesson 49: Show Me the (Parallel-Axis Theorem) Proof!

For the past couple of weeks I’ve been discussing moment of inertia, what it is, and how to calculate it. This week I’ll try to explain the related parallel-axis theorem. A body can have an infinite number of axes around which it can rotate. That means a body doesn’t have …

### The Physics Philes, lesson 47: Your Mission, If You Choose to Accept It…

Uuuuuuugh. I’m once again full of fail this week. And full of excuses! I have my trig final this week. On Wednesday. I’m nervous about it. I need to study. I really need to study. So I’m blowing this post off this week. I’m sorry! I really am. I love …

### The Physics Philes, lesson 46: Rotational Motion Gets Kinetic!

Guys! I’m back and ready to science! I hope you missed me. I’ll start today where I left it before the epic black hole detour. That’s right. We’re back in the domain of rotational motion. Specifically, we’ll discuss how to find the kinetic energy of a rigid, rotating body. To …

### The Physics Philes, lesson 45: I Failed, but I Had a Good Reasonfest

Oh guys. Guys, guys, guys. I intended to write a physics post this week. I really did. But I forgot that this weekend was Reasonfest on the University of Kansas campus. And hey, I when Greta Christina, Matt Dillahunty, Nate Phelps, and JT Eberhard comes to Kansas, you go see …

### The Physics Philes, lesson 44: Challenge Accepted Part 2

In which a challenge is issued, a challenge is accepted, and a challenge is completed…for real this time! If you will remember, last week I was issued a challenge involving black holes by this cheeky physicist I know. Even though I’m far too dumb to really get my head around …

### The Physics Philes, lesson 43: Challenge Accepted Part 1

In which a challenge is issued, a challenge is accepted, and a challenge is…completed? Over the past several months I have collected physicist Facebook friends like people collected Beanie Babies in the ’90s. (Only my collection will prove much more valuable in the long run.) Recently, one such friend issued …

### The Physics Philes, lesson 42: Angular and Linear Movement, Long-Lost Cousins

In which angular and linear motion are related, a discus is thrown, and math is a hero. If you’re a smart cookie, you may have anticipated what we’re going to discuss today. The equations for linear and angular motion with constant acceleration are incredibly similar. No one would fault you …